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MS 661 R C-M

The MS 661 professional chainsaw with a wrap-around handle (R) for greater maneuverability.

MS 661 R C-M
MS 661 R C-M is rated 4.4 out of 5 by 23.
Rated 5 out of 5 by from I keep coming back to Stihl quality! I started with a Stihl 041 AVES in the 1980's. It never failed me. I replaced it with an 066 Magnum in the 1990's which I recently sold for enough to pay for my dachshund's dental surgery! I just got the new 661 R-CM. The wrap handle is more than just comfortable. On my previous saw, it saved it from being crushed when it got pinched during felling, twice! It really assists lefties.I hear of complaints about the M-Tronic feature from some users resulting in the saw bogging or hard to start when warm. Do not frequently "quick-trigger" the throttle as this confuses the auto-adjust feature. Run the saw at a steady throttle prior to shutting it off. The "confusing" conditions can occur when rapidly limbing a log. Every operator has slightly different techniques, so if the M-Tronic feature doesn't suit you, go with the MS-461/880 saws..they lack this feature.I set-up my 661 with an 8-tooth sprocket, a 32" Rollomatic ES Light bar, & .050 X 3/8" skip-tooth chain. The saw has the power to handle the higher chain speed of that sprocket. The "Light" bar weighs about 30% less than the standard bar & definitely improves balance, especially with the longer bars. That longer bar also helps save back fatigue from stooping while limbing/bucking.I recommend 91+ Octane (ethanol-free) fuel with Stihl Ultra mix. Its like giving a treat to your dog! I ran that 066 for 20-yrs. & the carburetor had never been adjusted in all that time & it never failed to start!
Date published: 2018-03-01
Rated 5 out of 5 by from AWESOME!! Just Simply AWESOME!!! What a Great Saw! I bought the MS661 R C-M with a 25” Light Bar and an RSK Chain for the majority of the jobs and a 20” Rollomatic with some RS chains to Break in and do the dirty work with. I’m incredibly impressed with the power it has!! It’s the kind of power you would need to re-draw the laws of physics or re-start a dead planet for example! It just goes and goes!! Plenty of run time to the tank, so your not running to refill, but you will most likely want to push in the pin on the eco stop for the Oiler and let it really pump enough oil out to a longer bar. It’s the only thing on the Saw that I looked at and said “really??”.BREAK IN This was tough for me to find a good process for breaking in the pro saws. Here is what I found after talking with the tech line -easy and straight forward.-Mix 0.8 gal (Ethanol Free) to 2.6 oz of HO Ultra Oil (40:1 is about what that will give you for a mix) (I use 100LL Aviation Fuel and it loves it)- Cut (I cut wafers to get through the break in) with the Saw to burn up 3 tank fulls at least. The Saw will pick up power as you go.-Let the Saw idle after a few cuts to cool off - and jump back into it. Keep doing this until 3 tanks. - The saw really needs 5 tanks about to get the power up. It’s a monster out of the box but a game changer when broken in! - When cutting Go For It! No partial throttle. The computer control is fine and I’ve had no issues with it. Kind of nice not to adjust the carb and just focus on the work. Starts one pull every time. I’m loving this Saw and can’t believe I waited this long to get one. If your thinking about one- go get it! It’s worth every penny and then some! Great Product!!
Date published: 2017-12-23
Rated 5 out of 5 by from Like a hot knife in butter. As a timber farmer here in the PNW, I have been running saws for almost 30 years, and this is the best Stihl that I have ever used. My old 066 used to vibrate so much that after 4 hours of use I could not feel my hands. No more. This saw has a very much improved isolation system and even more power. My dealer told me to be careful with its fuel, and I have not had it long enough to comment. But I bought the Stihl canned gas just in case I give the chainsaw work a break for a few months. Want the best? Spend the money and get this saw.
Date published: 2017-06-30
Rated 5 out of 5 by from Good stuff yeye Ime a full time chaser on a thinning yarder, i bought this saw for personal use and use at work when only tree length comes to the landing. We got no processor or dansco and i buck 100+ foot logs with this saw. It starts everytime and doesnt even need the choke if you wanna rip on it a few extra times. My 661 gets tossed, thrown, and stepped on and packed with mud and gets wet all the time and still runs better than the lil 461's. I highly recomend it but ONLY run clear gass mix with stihl's brand of mixing oil otherwise you do get the same problems as all these other guys who blow up somthing too big for their balls
Date published: 2017-05-06
Rated 2 out of 5 by from This product needs a factory revision Starts hard when it is warm. We use it to cut logs on the landing and when you run it hard it will stall and not start up again. Sometimes you have to wait over half an hour for it to start again.
Date published: 2017-05-05
Rated 5 out of 5 by from The best saw ever made This is the best saw ever made. My tree service owns 5 of them and plan on a few more. It can kick back when cutting a knot. LOVE this saw. whenever one dies Im hanging one in my man cave
Date published: 2017-05-04
Rated 2 out of 5 by from This saw has intermittent problems and issues Saw works good most of the time but it stalls out sometimes and is hard starting and eventually after four months blows up. This is after a professional break-in, using stihls synthetic mix with 91 ethanol free fuel only. Took it back to the dealer can I find out why it failed. The only possibility they told me was it could've been from dust ingestion from the dirty filter
Date published: 2017-03-22
Rated 4 out of 5 by from Great power out of this saw but... I love the power and features however it cottons to have hot start issues which I've been hearing about a lot more. I will love this saw more if it gets fixed correctly...
Date published: 2016-10-04
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